Malicious PDF — malware analysis report

Static analysis result for SHA-256 32a7e0d89e0d54a9…

MALICIOUS

PDF

132.6 KB Created: 2021-06-27 21:04:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 36644e384cd22b7b4befc878f485a2c7 SHA-1: 3c0f3c6f58a690c044e85759ffe7119639ec40ed SHA-256: 32a7e0d89e0d54a9be3ba510c0b09aa31140e259e7b0160901840d719ee5fc3b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs and links to compromised CMS uploads, suggesting it's part of a link farm designed to redirect users to malicious sites. The primary attack pattern appears to be leveraging these links for phishing or malware distribution, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://crysiq.ru/uplcv?utm_term=16+windsor+road+scarsdale+ny PDF link annotation
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/548b8be3ef758dd82d8695ee043d8526/fudesadovisaginimajij.pdfIn PDF document text
    • http://signexpowholesale.com/project-new/christianbook/upload_images/file/43904147211.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/gt190sle9e5fv08i0ga48is302/21243305294.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bff47a1a0f9---20098916659.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/e9696b8445ad9b5f330285432b7d86af/juferebekaguruv.pdfIn PDF document text
    • https://yssnewlessons.org/UserFilesTwo/file/kugafosivajiku.pdfIn PDF document text
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/989f71d8275211fd06428289e6f8af90/jojupu.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160941f031b841---63499859799.pdfIn PDF document text
    • https://acronimocostanzo.com/userfiles/file/zekekukivosabeta.pdfIn PDF document text
    • http://booklandbooks.com/userfiles/file/99181661639.pdfIn PDF document text
    • http://sonkertrail.org/clients/9/92/9260a3c387aed4615f72c72c3a1da295/File/28624097651.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/d89400dd47e2059915080d73a4fea47b/jelunu.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080b9a2975db---legupa.pdfIn PDF document text
    • https://mfdesign.hu/files/file/vixuzovifakababasojodab.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160b790069cffb---23359832679.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/16a6157072b9659346c96738a34cd59b/44174376786.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16074629eb6e23---sasasajenokiwafefobusubo.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/388f5klhs96ur4bsmcikq9cppf/67905121920.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aa5c82d27a4---nomakejefogurotimem.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609f66e20833d---rukosojoladajigas.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/b763489d643b156a3a7a1c50ddef10a5/99798853222.pdfIn PDF document text
    • http://alexhoffordphotography.com/temp/files/file/vijipolunuwuworeleziwaw.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095edf502499---51749987542.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a5bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A5BD 17676 bytes
SHA-256: 1d73cda3a18b41e1af169a89d5f8d2056f7f843a44093946d91ae7766c62e4b7
font_01_sfnt_off0001d488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D488 10588 bytes
SHA-256: 4c55d6a414ba40029a27ad015c238fcfe85198d0e0255edb94cbb087447b3bb9
font_02_sfnt_off0001ecef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ECEF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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